Oil burner



June 3, 1941. A. I. SENIOR ETA-L 2,244,178

' OIL BURNER Filed Feb. 28. 1938 \NVENTORS ALFRED IRVINE SENIOR MAXWELLMc NABB BY \{MATTYS Patented June 3, 1941 OlIL BURNER Alfred IrvineSenior and Maxwell McNabb, Motueka, Nelson, New Zealand, assignors toThe Sirone Company Limited, Motueka, Nelson, New

Zealand Application February 28, 1938, Serial No. 193,142 In New ZealandMarch 25, 1937 4 Claims.

This invention has reference 'to burner appa- Y ratus designed for usewith oil fields and capable of beingemployed in a large "number ofcircumstances in which enclosed spaces require to be heated, andparticularly in such circumstances as are concerned with the heating ofdomestic cooking ranges or stoves, the heating of drying chambers, andin such like applications.

The invention is concerned with a manner of construction by which aburner apparatus is produced which in its operation provides for the oilfuel being fed to a burner pot contained within a combustion chamberinto which the air necessary to effect the vaporization and combustionof the oil is led by induction and inwhich the-'prodnets of combustionas they passjfrom the com-' bustion chamber intothe sphere to beheated,are

caused to be mingled withfa fulfthe heated air, to thus increaefliciency.

The accompanyingjidrawing ,illustrated the manner of giving effect totheinvention.

In such drawing-P 1 Figurel is a plan. being'shown in section. 5 I gFigure 2 is a front end elevation thereof. Figure 3 is a longitudinalsectional view therehe .bu

rner,- the casing of. I

Figure 4 is a cross sectional view-taken on the line 44 of Figure 3 andlooking to the left of such line.

Figure 5 is a rear end elevation.

Figure 6 is a rear end elevation of the burner chamber with the casingshown in section around it.

In this construction the burner combination comprises a hollowcylindrical combustion'cham ber i2 which has its inner end open andarranged to enter the sphere or enclosure through which the heat is tobe conveyed and in which a draught is induced in any suitable manner, toact upon theair supply to the burner. This chamber may be made toincrease in its diameter from its outer to its inner end. Near suchinner end the chamber is formed with an annular enlargement or flange l3extending out for an approved distance and such flange is formed with anumber of air holes I I. These air holes are disposed at approvedintervals apart all round the outside of the chamber and are made of anyapproved shape and size. There may be associated with the flange and itsair holes, a register plate ring l5 mounted on the chamber with its faceagainst the outside of the flange and adapted by being moved round theburner to more or less through the openin ill cover the air holes andthus to regulate the area of the passages through them. This registerplate is shown in dotted lines in Figures 1 and 3.

The chamber I2 is formed in its top, at about midway in its length, withan air entry opening l6 which is shaped of the triangular form shown.and extends. laterally in the periphery of the chamber and. also hasits two sides made to taper inwardly. asshown. This formation isdesigned to provide" that an .current drawn down ave an agitation, orswirling action;. imparted to"it, -to impinge on the lower part of the;chamber wherein the burner pot -11 is fitted. This pot is formed as atray aflixed to'a stem'piece i 8 screwing up through the bottom of thechamber 42 so that the pot may be held in an elevated position providingfor the free circulation of air above and below and all round it and mayalso be adjusted in its level. The tray is charged with a pad IQ of anabsorbent non-combustible material, such as asbestos, in

' order that oil delivered into the pot will be absorbed andits'combustion thus aided. Provision is made for the draining away ofany excess oil overflowing from the burner pot, such provisionconsisting in the small drain holes 20 formed in the chamber bottomaround the stem.

A second hole 2| is formed in the top of the chamber l2, upon the innerside of the air opening l6, and through this hole 2! the oil fuel supplypipe 22 is led down to deliver the fuel to the burner pot H. In somecases, however, the pipe 22 may be led in through the air opening IS.

The outer end 01' the chamber is open to permit of access for attentionthereto and to the burner pot, but such end is provided with a removablecover plate 23 which is made to .extend up to close the opening with theexception of a small space at the top.

Combining with the burner chamber 12 is the outer casing 25, which ismade of light nietalas compared with that of the chamber. This casing isof cylindrical form and is made to flt over the outer end of the chamber12 and has its forward end attached in any approved manner to the flangeI3 as by means of screws passing through it into the flange. The casingis made of a diameter such as to leave a clear annular space between itand the chamber l2, into which the air entry opening l6 of that chamberopens and which at its inner end connects with the air holes ll in theflange. Distance pins 40 (Figures 3, 4 and "6) may be screwed radiallyoutward through the burner rear end to maintain the casing in its trueconcentric position on the burner chamber. Provision is made for thefree entry of air into this casing through the inductive force actinginthe burner chamber, and such provision consists in the formation ofthe casing with an air opening 26 at its rear end. The said air opening26 provided in the casing is made of a nature such that its area may bereadily controlled and for this purpose a flap hood 28 is hinged alongthe top of the opening so that it may be swung in or out to uncover theopening less or more-in accordance with the air feed required and theconsequent combustion of the fuel.

The air thus drawn into the casing feeds the burner pot IL through theopening It, to cause the combustion of the oil fuel while it also passesalong the annular space in contact with the wall of the chamber l2 sothat it is heated and tends to keep the chamber cool, and issues throughthe holes H in a series of Jets to mingle with the products ofcombustion as they issue from the inner end of the burner chamber.

It is preferred, also, in respect of this apparatus that additional airmay be drawn in by induction to mingle with the air passing through theaperture l4 before such is caused to join the combustion productsissuing from the burner mouth. To provide for this a plate i3 is atflxedto the inside of the flange I3 at a short distance away therefrom andthis plate is so made as to leave an opening l3 through it immediatelysurrounding the burner chamber outlet. The air thus passing through thepassages I! will pass through this opening I3 and will, by induction,cause a flow of air in through the space bet ween the flange l3 andplate I3 and this air will pass also through the opening l3". Theadditional air will serve to keep the outside of the burner cool andwill itself be warmed by its contact with the burner. The plate 13 maysuitably be the front plate of the furnace, or other appa-. ratus, withwhich the burner is combined in its use.

Water vapour for mixture with the air and to increase the heatproduction, is provided for by means of a water well 30 positionedinside the casing and fed with water through a pipe 3!. Such well may besecured upon the casing bottom, as in Figures 3 and 6. The heatradiating from the burner chamber will vapourize the water so that itsvapour will mingle with the air passing through the casing.

An inspection opening 32 is formed in the casing top and this has acover 33. A drain pipe 34 for leading ofl. any moisture collecting inthe casing opens from the casing. bottom.

We claim: 1

1. An oil fuel burner comprising, in combination, a horizontalcylindrical burner chamber open at its inner end and formed with an airentry opening in its top at about midway its length and with an annularflange extending out from near its inner end and being provided with anumber of apertures through it at circumferentially spaced intervals, aburner pot fitted in the chamber beneath the said entry opening, an oilfeed pipe leading downwardly into such pot, and a cylindrical casingenclosing the outer end and the wall of the burner chamber disposed toleave a clear annular space between them and to flt at its inner endaround the said annular flange, and which casing is formed with an airentry opening at its outer end.

2. An oil fuel burner according to claim 1, in which the said annularflange has combined therewith an annular plate attached to its innerside at a distance therefrom, said annular plate surrounding the innerend of the burner chamber in a manner such as to leave an openingbetween them.

3. An oil fuel burner combination according to claim 1, in which theouter end of the burner chamber is formed with an air opening at itstop.

4. An oil fuel burner combination according to claim 1, in which theburner pot is formed by a tray containing a pad of absorbentnon-combustible material and mounted upon a. stem piece which is screwedvertically through the bottom of the burner chamber.

ALFRED IRVINE SENIOR. MAXWELL McNABB.

